There is mail in your mailbox six days a week so let's take time out of our day to thank the mail person who is responsible for getting it there! Thank A Mail Carrier Day (also known as Thank a Mailman Day) is always observed on February 4th.
NATIONAL CREATE A VACUUM DAY. A space entirely devoid of all matter is a vacuum. On February 4 of every year, we are challenged to create one. A vacuum is created when the pressure inside a space is lower than the pressure outside the area.
Feb 4, 2019 - National Create A Vacuum Day. National Create A Vacuum Day is an annual celebration observed on February 4th of every year. In everyday usage, a vacuum is simply the volume of space which is empty of matter. Vacuum implies that the gaseous pressure is much less than that of the atmospheric pressure.